Isolated Physical Networks for Network Function Virtualization

1. A system comprising: a plurality of physical machines, each physical machine executing a virtual machine that runs a Virtual Network Function (VNF) component of a VNF, each physical machine comprising: a first physical network interface; and a second physical network interface; wherein each VNF component uses a first virtual network interface and the first physical network interface of its respective physical machine to communicate with a first network and uses a second virtual network interface and the second physical network interface of its respective physical machine to communicate with a second network isolated from the first network, wherein the VNF component acts as a demarcation point between the first and second networks such that traffic for the first network is not shared on any network cable with traffic for the second network.

2. The system of claim 1, wherein the first physical network connects to an access network.

3. The system of claim 1, wherein the second physical network connects to a core network.

4. The system of claim 1, wherein the VNF component is associated with signaling traffic.

5. The system of claim 1, wherein the VNF component is associated with bearer traffic.

6. The system of claim 1, wherein the VNF comprises one of: a Session Border Controller (SBC), an Internet Protocol (IP) Multimedia Subsystem (IMS) core, and a telephony application server.

7. The system of claim 1, wherein the first and second physical networks are established via an SDN controller.

8. The system of claim 1, where each virtual machine comprises the first virtual network interface mapped to the first physical network interface and the second virtual network interface mapped to the second physical network interface.

9. The system of claim 8, wherein the VNF component is configured to communicate with the first physical network through the first virtual network interface and communicate with the second physical network through the second virtual network interface.

10. A method comprising: with a first virtual network interface of a Virtual Network Function (VNF) component, communicating with a first physical network connected to a first physical network interface of a physical machine executing the VNF component, the physical machine being in a datacenter; and with a second virtual network interface of the VNF component, communicating with a second physical network connected to a second physical network interface of the physical machine, the second physical network being isolated from the first physical network, wherein the VNF component serves as a demarcation point between the first and second networks such that access network traffic and core network traffic traverse different physical network cables in the datacenter.

11. The method of claim 10, wherein the VNF component runs directly on the physical machine.

12. The method of claim 10, wherein the VNF component is provisioned using Metal as a Service (MaaS).

13. The method of claim 10, wherein the VNF component runs on a virtual machine running on the physical machine.

14. The method of claim 13, wherein the first virtual network interface is mapped to the first physical network interface and the second virtual network interface is mapped to the second physical network interface; and wherein the VNF component is configured to communicate with an access network through the first virtual network interface and communicate with a core network through the second virtual network interface.

15. The method of claim 10, further comprising, with a VNF manager that manages the VNF, instructing a Software-Defined Networking (SDN) controller to map a first virtual network interface to the first physical network interface and map a second virtual network interface to the second physical network interface.

16. The method of claim 10, wherein the VNF component runs on a virtual machine running on the physical machine, and further wherein the VNF component is associated with signaling traffic.

17. The method of claim 10, wherein the physical machine is one of a plurality of physical machines within the datacenter, each of the physical machines comprising: a first network interface connected to the first physical network; and a second network interface connected to the second physical network.

18. A system comprising: a plurality of physical computing systems, each of the physical computing systems comprising a processor, a memory, and at least two physical network interfaces; a first network connected to a first one of the physical network interfaces for each of the physical computing systems, the first network being connected to an access network; and a second network connected to a second one of the physical network interfaces for each of the physical computing systems, the second network being connected to a core network, the second network being isolated from the first network, wherein a Virtual Network Function (VNF) component serves as a demarcation point between the first and second networks, such that traffic for the access network and traffic for the core network traverse different physical cables.

19. The system of claim 18, wherein the first network and the second network comprise packet switched Ethernet networks.

20. The system of claim 18, wherein at least one of the plurality of physical computing systems is configured to provide a cloud computing environment to run VNF components of the VNF and at least one of the plurality of physical computing systems is configured to directly run VNF components of the VNF.